Walmart’s new CEO John Furner could be called a retailer gunslinger. He’s not afraid to take risks, and as he works through his first week replacing former CEO Doug McMillon, he may be starting a tenure that takes more risks than anyone in the retailer’s history.In his first companywide memo as CEO, Furner said on Monday he plans to spend his first few weeks in stores, supply chain facilities and support offices, where he will speak directly with workers. He also had one “simple ask” for all Walmart employe ...